Garmin GPS 19x NMEA 0183 Manuale di istruzioni per l'installazione - Pagina 13

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8 Select an option.

• If you want to align the heading to match the front of the boat, proceed to the next step.

• If you do not want to align the heading, stop turning and wait, keeping the boat stationary. Over the next

two minutes the heading data should disappear and then reappear. When the heading data reappears, the

compass should be calibrated and no heading offset should be applied.

NOTE: If an unwanted heading offset is applied, repeat the calibration procedure.

9 Continue turning in the same direction at the same speed for approximately ten seconds, until the heading

data disappears from the display

10 When it is safe, straighten the boat and drive in a straight line

6.4 km/h (4 mph)) until the heading data appears

When the heading appears, the compass has been calibrated, and the heading has been aligned on the

antenna.

11 Test the results of the calibration, and repeat this procedure if necessary.

Disabling the Magnetic Heading Data

If you cannot mount the antenna in an ideal location for magnetic heading and GPS performance, you can

disable the magnetic heading data.

1 Drive the boat to a location with calm, open water.

2 Set the display to view heading data from the antenna.

3 Disconnect power from the antenna.

4 Wait while the boat becomes level and stationary.

5 Turn on power to the antenna, and wait until the heading data appears on the display

6 Within three minutes, complete two full, slow, tight circles

level as possible.

Heading data disappears to indicate that the antenna has detected the start of the procedure

You may receive an error message that the heading was lost. You can ignore this message.

7 Bring the boat to a complete stop

After two minutes, the heading data reappears with a fixed value of 123 degrees

be disabled on the next power cycle.

NOTE: If the magnetic heading is displayed, the fixed value is 123 degrees. If the true heading is displayed,

the fixed value may deviate because of corrections from magnetic variation.

8 Disconnect power from the antenna.

9 Turn on power to the antenna, and verify that heading has been disabled

, and remain stationary for two minutes.

at cruising speed (must be at least

, taking care to keep the boat as steady and

to indicate heading will